One possible plot could be about how the two characters deal with the unexpected pregnancy. Maybe Russia is initially shocked but then becomes very protective of fem America. There could be cultural differences in how they approach the pregnancy, like Russia having more traditional views compared to fem America's more modern ideas.
Perhaps the fanfic could explore the political implications in the Hetalia universe. A pregnant fem America could cause a stir among other countries. Russia might have to navigate diplomatic relations while also being there for fem America. This could add a layer of drama and conflict to the story as they try to balance personal and international matters.
I'm not sure of specific fanfics with this exact combination, but you can try searching on popular fanfic platforms like Archive of Our Own. There are often many Hetalia - related fanfics there. Just use the search terms 'Hetalia', 'Russia', 'female America' and 'pregnant' to narrow down your search.
Another idea is that it could be a deep exploration of their relationship. The pregnancy could be a metaphor for a new level of closeness and cooperation between them. It could start with an accidental situation that forces them to re - evaluate their feelings for each other. As the 'pregnancy' progresses, they learn more about themselves and each other, leading to a transformation in their relationship.
America's brash and confident personality would likely lead to him initially being in denial or trying to handle the situation on his own terms. He might see it as a challenge to overcome, like he does with many things in the Hetalia series. For example, he could try to come up with some grand, unorthodox solution without really thinking it through.
There are several great ones. For example, 'The Diplomatic Bond' which focuses on their political interactions and how they gradually build a deeper understanding outside of the usual rivalries. It shows their growth as nations in a non - romantic but still engaging way.
Well, one possible plot could be that the other characters in Hetalia are initially shocked. They then have to take care of baby America. Maybe they struggle with things like feeding him, changing diapers. And as they do so, they might discover new sides of America's personality that were hidden before.
Perhaps there's a treasure hunt involved. The pirates believe America has some clue to a great treasure because of his unique position in the world. So they take him along on their adventure, and along the way, there are lots of comical misunderstandings as America tries to explain modern concepts to the pirates.
One idea could be that Captain America has to balance his superhero duties with taking care of his pregnant wife. He might worry about protecting her from his enemies who could target her. For example, he could start setting up extra security around their home and be more cautious about his public appearances to not draw unwanted attention.
One possible plot could be that America discovers she's pregnant and she and Prince Maxon have to deal with the reactions from the court. They might face challenges like concerns over the heir's legitimacy or the political implications of a new royal baby.
One common theme is unity. Fanfictions often show Fem America bringing the states together despite their differences. For example, in many stories, there might be a crisis that forces the states to cooperate, and Fem America is the driving force behind that unity.
Adventure is a theme that shows up as well. They could go on adventures together, exploring different parts of the world or even fictional realms. And of course, there's the theme of self - discovery. In these fanfictions, Fem America and Fem England often discover new aspects of themselves through their interactions with each other, whether it's their hidden talents or their true feelings.